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| | | Ecosystem Approaches to Management |
Maintained by NOAA
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| | Ecosystem approaches to fishery management | | |  Management actions aimed at conserving the structure and function of marine ecosystems, in addition to conserving the fishery resource.
An ecosystem approach to fishery management aims to protect and rebuild ecosystems, including species and their habitats. It will add to, rather than replace, the approach of managing fish stocks one by one, or “single species” management.
Fisheries management will: - be adaptive,
- be geographically specified,
- take account of ecosystem knowledge and uncertainties,
- consider multiple external influences, and
- strive to balance diverse societal objectives.
The transition to an ecosystem approach to management needs to be incremental and collaborative. Although scientists have been studying ecosystem processes for decades, long term scientific research is still needed.
The precautionary approach and risk-averse policies have been advocated globally as essential to fisheries management. One approach is to demonstrate that fishing practices will not damage the stock, habitat or other ecosystem properties before allowing fishing to increase. This will assist the ecosystem approach to sustain and restore both fisheries and their ecosystems.
Based on Making “Ecosystems” part of NOAA’s shared vocabulary. November 2003. | | Photo title: Habitat damage: the swath of a boat propeller is clearly visible in this Florida Keys seagrass bed | | Photo credit: Harold Hudson, Florida Keys National Marine Sanctuary | | | | Impacts of fisheries on ecosystems | | |  Impacts of fisheries on ecosystems are sometimes difficult to separate from environmental effects on ecosystems. Some of these possible fisheries effects include: - direct impacts of overfishing
- modifying community species composition and genetic diversity through selective targeting on species and particular size classes
- impacts on non-target species through low selectivity of certain gears
- incidental mortality from lost or abandoned gear
- direct impact on the sea bed through trawls and dredges
- destructive illegal “fishing gear” such as dynamite and poisoning.
Marine protected areas can make an important contribution to integrated coastal zone management and ensure improved management of ecosystems.
Shrimp trawling results in bycatch and waste, up to 12 times bycatch for every 1 lb or kilo of shrimp. | | Photo title: Shrimp trawl catch | | Photo credit: Norbert Wu, Pew Collection | | | | Other human impacts on ecosystems | | | | Of course, there are human impacts on the marine ecosystem, other than fishing, described within the UN Atlas: |  | | Photo title: Marine debris at Sardinia, Italy | | Photo credit: Norbert Wu, Pew Collection | | | | |
 | | | | | NEWSLETTER JANUARY 2005
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| Dear UN Atlas members,
"I am sure that like me, many of you have watched the most recent natural disaster in Asia unfold with both the wonder and awe of a geoscientist and the compassion of a fellow human being," Lihini Aluwihare, researcher at Geosciences, Sri Lanka.
This newsletter and all recent efforts in bringing you information on the world's oceans focuses on the devastating tsunami tidal waves which so violently ravaged southern Asia.
As members of the UN Atlas, we are all part of the global effort to support the peoples of the Indian Ocean as they rebuild their coastal communities and develop capacity for earthquake prediction and management. Our home page now has a dedicated area for exchanging and accessing information to which all of us can contribute: Asian Tsunami 26 December 2004. You will find additional and relevant topics describing the impact of tsunamis on the ecosystem, tsunami warning systems, maps and profiles of the areas affected, as well as reports on recent action taken by the United Nations and other organizations in helping with rehabilitation projects.
If you think this newsletter may interest someone you know, please forward it. To contribute and participate in the growing Atlas community, become a Member of the UN Atlas today.
Thank you,
The UN Atlas of the Oceans Editors
Visit the UN Atlas of the Oceans Web site
Comments? Please write to UN-Atlas-Oceans-Project@fao.org | |
Read more at http://www.oceansatlas.o ... 2005.html.
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| Tina Farmer
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1076 Topics - 5135 Related Knowledge - 2534 Members - 34 Editors |
